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Re: Changed print wheel (same type as previous) now...
Check the "Pitch" selector slide switch on the lhs of the keyboard... it should be on 10, 12 etc position to match the printwheel... NOT in the PS position.
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Hammer sticking and typing incorrect letters (and or skipping letters): 1) make sure daisy wheel installed correctly. 2) hold down CODE key & Q (RESET) to reset wheel...if still not corrected 3) WD40 the hammer at the base & joints where moving parts are, keep typing until oil seeps in (this last one fixed it for me)
Typing light and inconsistant-top part of letter okay but bottom too light or not there: to left of hammer (at base) are 2 screws, I losened them and adjusted hammer to different forward and backward spots..finally found the ideal location where full letter printed and had the correct force it needed to print correctly.
The SX 4000 is a "Daisy Wheel" printer. A plastic Wheel with the letters embossed on them spin via the input of the keyboard. I would suggest that your Daisy Wheel mhas slipped its index, presenting a offset letter., or the wheel is on inproper, but I do not see how it could happen, short of forcing it on. You may have to buy another Daisy Wheel, if that one is broken at the hub. See:
I downloaded the manual from http://www.devicemanuals.com/downloadguide.php and then, following the instructions there, I removed then re-inserted the daisy wheel. This solved my problem. Perhaps it had somehow gotten out of adjustment. At least, it is something to try if you haven't tried it already.
The ML-300 needs to be reset each time the Daisy Wheel is removed or replaced or if the Keyboard Switch changes
position. According to Brother, if this is not done the typewriter will print incorrect characters.
Try these steps:
1) Open the Top Cover. There is a lever directly behind the Daisy Wheel. Pull the lever back towards you. Remove
the Daisy Wheel by pulling it up and out.
2) Verify that it is the Standard Daisy Wheel that came with your machine and not a Symbol or International Daisey
Wheel. Write down the Pitch (10, 12, or dual pitch 1012) printed on the wheel.
3) Reinstall the Daisy Wheel (the plastic top ear goes to your right.) Push the lever (step 1) forward.
4) Press the ALT key plus the PITCH key and the number 1 key simultaneously. Verify the Pitch setting is the same as
is printed on the Daisy Wheel.
5) Press the CODE key plus the RESET key and the letter Q key simultaneously. This will reset the typewriter
mechanism and align (or time, in technical terms) the carriage mechanism.
Check if the typewriter prints correctly now. If still incorrect, perform these additional steps.
6) Verify the three position Keyboard Switch (inside the top cover, on the right side, at the bottom) is in the
I=Standard position. The other positions are: II=International and III=Symbol.
7) If the Keyboard Switch is in the correct position, slide it to position III and then back to I. (This will clean the
switch contacts in case they are dirty and not making good electrical contact.
8) Press the CODE key plus the RESET key and the letter Q key combination again to reset the typewriter mechanism.
Check if the typewriter prints correctly now.
If still incorrect, the only other things I can think of is that:
1) an incorrect Daisy Wheel is installed that does not work in the ML-300. Brother sell a "B type" Daisy Wheel with
two plastic ridges/raised slots below the center of the Daisy Wheel (viewed with the raised top tab on your left.)
The B type are incompatible with your machine.
2) the typewriter has failed and needs repair.
Does it always type the same wrong letter ie
a always prints u or w ? if so the print wheel drive gear is out of position. if not and it get random letters some thing may be interfering with the wheel rotation.
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